Reference Values

MYOCARDITIS-PERICARDITIS PANEL

ECHOVIRUS ANTIBODIES, SERUM

REFERENCE RANGE: <1:8

INTERPRETIVE CRITERIA:

<1:8 Antibody Not Detected

>or=1:8 Antibody Detected

Single titers >or=1:32 are indicative of recent infection. Titers of 1:8 and 1:16 may be indicative of either past or recent infection, since CF antibody levels persist for only a few months. A four-fold or greater increase in titer between acute and convalescent specimens confirms the diagnosis. There is considerable cross-reactivity among enteroviruses; however, the highest titer is usually associated with the infecting serotype.

INFLUENZA TYPE A AND B ANTIBODIES, SERUM

REFERENCE RANGE: <1:8

INTERPRETIVE CRITERIA:

<1:8 Antibody Not Detected

>or=1:8 Antibody Detected

Single titers of >or=1:64 are indicative of recent infection. Titers of 1:8 and 1:32 may be indicative of either past or recent infection, since CF antibody levels persist for only a few months. A four-fold or greater increase in titer between acute and convalescent specimens confirms the diagnosis.

CHLAMYDOPHILA PNEUOMIAE ANTIBODIES (IgG, IgA, IgM)

REFERENCE RANGE:

IgG <1:64

IgA <1:16

IgM <1:10

The immunofluorescent detection of specific antibodies to Chlamydophila pneumoniae may be complicated by cross-reactive antibodies, non-specific antibody stimulation, or past exposure to similar organisms such as C. psittaci and Chlamydia trachomatis. IgM titers of 1:10 or greater usually indicate recent infection, and any IgG titer may indicate past exposure. IgA is typically present at low titers during primary infection but may be elevated in recurrent exposures or in chronic infection.